COMP1521 Revision Quiz

In MIPS, which of the following is used when calling a function?

• jal

• sb

• add

• li

In MIPS, how are arguments by convention passed to a function?

• They are stored in the stack

• They are stored in registers $a0–$a3

• They are stored in the data segment

• They are stored in registers $t0–$t3

In MIPS, which register is by convention used to store the return value of a function?

• $v0

• $a0

• $t0

• $s0

By convention, what is the primary difference between the $t registers and $s registers in MIPS?

• $t: used for arithmetic operations

  $s: used for logical operations

• $t: stores function arguments
  $s: stores temporary values

• $t: may not be preserved across function calls

  $s: preserved across function calls

• $t: used for data transfers

  $s: used for arithmetic and logical operations

In MIPS, how do you access the second element of a 32-bit integer array stored in memory?

(The memory address of the array is stored in $s0.)

• lw $t0, 2($s0)

• la $t0, 4($s0)

• lw $t0, 4($s0)

• lb $t0, 8($s0)

In MIPS, how would the wam field be accessed?

(The memory address of the struct is stored in $s0.)

• lw $t0, 18($s0)

• lw $t0, 20($s0)

• lw $t0, 19($s0)

• lw $t0, 16($s0)

In MIPS, which registers are used to store the result of mult?

• $hi

• $mul

• $lo
• $v0

After executing this, what are the contents of $lo and $hi?

• $lo = 3

  $hi = 10

• $lo = 10

  $hi = 3

• $lo = 30

  $hi = 100

• $lo = 100

  $hi = 30

What does this do?

• Calculate the sum of $t0 and $t1

• Calculate the product of $t0 and $t1

• Increment $t0 until it's equal to $t1

• Decrement $t0 until it's equal to $t1

What is the result of 0b1010 & 0b1100?

· · ·

0b1010

0b1100

• 0b1000

• 0b100

• 0b1100

• 0b10